def getProduct( n ):
if isinstance( n, RPNGenerator ):
return getProduct( list( n ) )
elif isinstance( n[ 0 ], ( list, RPNGenerator ) ):
return [ getProduct( arg ) for arg in n ]
if not n:
return 0
elif len( n ) == 1:
return n[ 0 ]
hasUnits = False
for item in n:
if isinstance( item, RPNMeasurement ):
hasUnits = True
break
if hasUnits:
result = RPNMeasurement( 1, { } )
for item in n:
if isinstance( item, list ):
return [ getProduct( arg ) for arg in item ]
result = result.multiply( item )
return result
else:
if not n:
return 0
if isinstance( n[ 0 ], list ):
return [ getProduct( item ) for item in n ]
else:
return fprod( n )
